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Debt (Narrative) (Details 2) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Nov. 30, 2015
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Sep. 30, 2014
Jun. 30, 2014
Dec. 31, 2016
Dec. 31, 2015
Repurchase agreements [Member]                
Debt and stated interest rates                
Remaining maturity of outstanding amount for short term borrowings             3 months 1 month
Federal Home Loan Bank advances [Member]                
Debt and stated interest rates                
Remaining maturity of outstanding amount for short term borrowings             4 months 3 months
Ameriprise Financial [Member] | Repurchase agreements [Member] | Residential mortgage backed securities [Member]                
Debt and stated interest rates                
Securities pledged as collateral             $ 33 $ 30
Ameriprise Financial [Member] | Repurchase agreements [Member] | Commercial mortgage backed securities [Member]                
Debt and stated interest rates                
Securities pledged as collateral             19 22
Ameriprise Financial [Member] | Federal Home Loan Bank advances [Member] | Commercial mortgage backed securities [Member]                
Debt and stated interest rates                
Securities pledged as collateral             $ 771 290
Ameriprise Financial [Member] | Senior notes due 2026 [Member]                
Debt and stated interest rates                
Unsecured senior notes issued   $ 500            
Debt issuance costs   $ 4            
Ameriprise Financial [Member] | Junior subordinated notes due 2066 [Member]                
Debt and stated interest rates                
Extinguishment of debt, amount     $ 229 $ 16       49
Gains (losses) on extinguishment of debt       $ 1       $ 1
Ameriprise Financial [Member] | Senior notes due 2015 [Member]                
Debt and stated interest rates                
Extinguishment of debt, amount $ 350              
Ameriprise Financial [Member] | Senior notes due 2024 [Member]                
Debt and stated interest rates                
Unsecured senior notes issued         $ 550      
Debt issuance costs         $ 5      
Ameriprise Financial [Member] | Senior notes due 2039 [Member]                
Debt and stated interest rates                
Extinguishment of debt, amount           $ 200